Senior Backend Developer - Payments
Core
Design and scale mission-critical payment systems supporting international card networks, real-time QR payments, and high-volume switching platforms for retail POS and e-commerce environments.
Role type
Senior IC backend systems engineer (payments)
Builds
High-performance authorization, clearing, and settlement systems for Visa, Mastercard, Amex, and UPI
Domain
Financial services / Payments infrastructure
Deliverable
production ML models | product features | infrastructure
Required skills
C++, Linux system administration, distributed system architecture, high-volume transaction processing, database optimization (PostgreSQL/MySQL), messaging systems (IBM MQ), legacy system modernization
Preferred skills
Base24 experience, QR payment ecosystem knowledge, POS/EDC/ATM system familiarity
Technologies
Linux RHEL, IBM MQ, PostgreSQL, MySQL, Visa, Mastercard, Amex, UPI
Responsibilities
Design and build high-performance backend systems for card and QR payment integrations; Architect secure solutions for authorization, clearing, and settlement workflows; Lead migration of legacy payment platforms to cloud or Linux RHEL environments; Optimize switching systems for ultra-high transaction volumes and low latency; Collaborate with cross-functional teams to deliver global payment capabilities
Seniority
Senior, hands-on IC